docs: def add_color_stop_rgb(self, offset, red, green, blue):
          """Same as :meth:`add_color_stop_rgba` with ``alpha=1``.
          Kept for compatibility with pycairo.
  
          """
          cairo.cairo_pattern_add_color_stop_rgb(
              self._pointer, offset, red, green, blue)
          self._check_status()